Figure 6.

Effect of cytokinin on transcript level of genes encoding key steps in the chlorophyll biosynthesis pathway and of LHCB genes in mutants of B-type ARR genes during dark-to-light transition. Seedlings were grown for 3 d in dark on medium (MS, no Suc) with or without 1 µM BA prior to exposure to light. Transcript levels of chloroplast-related genes in single arr1, arr10, and arr12 mutants (A) and the arr1 arr10 arr12 mutant (B) compared to the wild type. Transcript levels of additional genes can be found in Supplemental Figure S4. Transcript levels of the wild type (control conditions) in dark were set to 1 (n ≥ 3). Letters indicate significant differences between the wild type and the different genotypes under control condition (a) or after BA treatment (b) or between control and BA treatment for each genotype (c) (P < 0.05).